On Sunday, the Raiders will head to Cincinnati to take on the Bengals, who have problems of their own to be sure. Their starting quarterback is out for the year, and they have floundered this year en route to a 5-8 record. But even so, their defense deserves some respect for even getting them this far, and quarterback Derek Carr has turned to his defensive coordinator, former Bengals DC Paul Guenther, and his backup quarterback AJ McCarron for help in preparing for their former team this week. “Absolutely, [Guenther] and AJ McCarron. AJ, he was throwing against these guys all the time....